TitanEngine is a Windows-native C/C++ library for reverse engineering, debugging, and unpacking PE executables. It provides a large exported C API covering process debugging (create/attach/detach, breakpoints, stepping), memory and register manipulation, PE file parsing and modification (sections, imports, exports, relocations, TLS), hooking (code redirection, IAT patching), import reconstruction (IAT scanning, dump fixing via integrated Scylla wrapper), anti-debugging evasion, and static file analysis (hashes, decompression). The codebase is primarily a monolithic DLL with hundreds of functions, tightly coupled to the Windows NT API and undocumented structures. It is the core engine behind the x64dbg debugger's unpacking and import-repair capabilities. While the library is functionally complete and has been battle-tested, it exhibits significant technical debt: heavy use of global mutable state, non-reentrant functions, manual memory management, hardcoded OS-specific offsets, and monolithic functions (e.g., DebugLoop). Some subsystems—such as the breakpoint handler, memory I/O with breakpoint bypass, file mapping utilities, and the self-contained ntdll.h header—demonstrate high craftsmanship and are reusable in other projects. The integration of scylla_wrapper and distorm adds well-engineered components for import scanning and disassembly, but overall the codebase requires careful use due to thread-safety and maintenance concerns.